Immediately after I got my Arduino, I started to apply the projects I found on the web.  One of the first projects I do is writing on a LCD screen.

Here is the hardware list:

  • Arduino Board
  • LCD Screen (compatible with Hitachi HD44780 driver)
  • pin headers to solder to the LCD display pins
  • 10k Potentiometer
  • breadboard
  • hook-up wire

First I soldiered the male pin header strip to the LCD screen. Then, it is ready to set up the connections.

LCD_bb

IMG_1943

 

And the code as follows:

/*
  LiquidCrystal Library – Hello World
 
 Demonstrates the use a 16×2 LCD display.  The LiquidCrystal
 library works with all LCD displays that are compatible with the 
 Hitachi HD44780 driver. There are many of them out there, and you
 can usually tell them by the 16-pin interface.
 
 This sketch prints “Hello World!” to the LCD
 and shows the time.
 
  The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * 10K resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 
 Library originally added 18 Apr 2008
 by David A. Mellis
 library modified 5 Jul 2009
 by Limor Fried (http://www.ladyada.net)
 example added 9 Jul 2009
 by Tom Igoe
 modified 22 Nov 2010
 by Tom Igoe
 
 This example code is in the public domain.

 http://www.arduino.cc/en/Tutorial/LiquidCrystal
 */

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup() {
 // set up the LCD’s number of columns and rows: 
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print(“hello, world!“);
}

void loop() {
// set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):
lcd.setCursor(0, 1);
// print the number of seconds since reset:
lcd.print(millis()/1000);
}

Share this:

Leave a Reply